From b4128c780603bf6d27db5819be3b6b05c64b4318 Mon Sep 17 00:00:00 2001
From: Jonathan Davies <jpds@protonmail.com>
Date: Thu, 13 Nov 2025 17:58:22 +0000
Subject: [PATCH 1/3] promethus-alertmanager: Use finalAttrs

---
 pkgs/servers/monitoring/prometheus/alertmanager.nix | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/pkgs/servers/monitoring/prometheus/alertmanager.nix b/pkgs/servers/monitoring/prometheus/alertmanager.nix
index 18b4dc52e323..651706399c79 100644
--- a/pkgs/servers/monitoring/prometheus/alertmanager.nix
+++ b/pkgs/servers/monitoring/prometheus/alertmanager.nix
@@ -7,15 +7,14 @@
   nixosTests,
 }:
 
-buildGoModule rec {
+buildGoModule (finalAttrs: {
   pname = "alertmanager";
   version = "0.29.0";
-  rev = "v${version}";
 
   src = fetchFromGitHub {
-    inherit rev;
     owner = "prometheus";
     repo = "alertmanager";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-2uP4JCbQEe7/en5sBq/k73kqK6YVmuLvfiUy1fqPitw=";
   };
 
@@ -31,8 +30,8 @@ buildGoModule rec {
       t = "github.com/prometheus/common/version";
     in
     [
-      "-X ${t}.Version=${version}"
-      "-X ${t}.Revision=${src.rev}"
+      "-X ${t}.Version=${finalAttrs.version}"
+      "-X ${t}.Revision=unknown"
       "-X ${t}.Branch=unknown"
       "-X ${t}.BuildUser=nix@nixpkgs"
       "-X ${t}.BuildDate=unknown"
@@ -53,7 +52,7 @@ buildGoModule rec {
   meta = with lib; {
     description = "Alert dispatcher for the Prometheus monitoring system";
     homepage = "https://github.com/prometheus/alertmanager";
-    changelog = "https://github.com/prometheus/alertmanager/blob/v${version}/CHANGELOG.md";
+    changelog = "https://github.com/prometheus/alertmanager/blob/v${finalAttrs.version}/CHANGELOG.md";
     license = licenses.asl20;
     maintainers = with maintainers; [
       benley
@@ -62,4 +61,4 @@ buildGoModule rec {
       Frostman
     ];
   };
-}
+})

From fc317efeeac928923844aa557b9179828c6371c5 Mon Sep 17 00:00:00 2001
From: Jonathan Davies <jpds@protonmail.com>
Date: Thu, 13 Nov 2025 18:05:04 +0000
Subject: [PATCH 2/3] prometheus-alertmanager: Migrate to by-name

---
 .../pr/prometheus-alertmanager/package.nix}                      | 0
 pkgs/top-level/all-packages.nix                                  | 1 -
 2 files changed, 1 deletion(-)
 rename pkgs/{servers/monitoring/prometheus/alertmanager.nix => by-name/pr/prometheus-alertmanager/package.nix} (100%)

diff --git a/pkgs/servers/monitoring/prometheus/alertmanager.nix b/pkgs/by-name/pr/prometheus-alertmanager/package.nix
similarity index 100%
rename from pkgs/servers/monitoring/prometheus/alertmanager.nix
rename to pkgs/by-name/pr/prometheus-alertmanager/package.nix
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 0cf76772b6b0..3689dcff2953 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9528,7 +9528,6 @@ with pkgs;
   postgrest = haskellPackages.postgrest.bin;
 
   prom2json = callPackage ../servers/monitoring/prometheus/prom2json.nix { };
-  prometheus-alertmanager = callPackage ../servers/monitoring/prometheus/alertmanager.nix { };
   prometheus-apcupsd-exporter = callPackage ../servers/monitoring/prometheus/apcupsd-exporter.nix { };
   prometheus-artifactory-exporter =
     callPackage ../servers/monitoring/prometheus/artifactory-exporter.nix

From 9b1b9887f5ed7fd9ffe6af0056be582faf9a7dc2 Mon Sep 17 00:00:00 2001
From: Jonathan Davies <jpds@protonmail.com>
Date: Thu, 13 Nov 2025 18:10:01 +0000
Subject: [PATCH 3/3] prometheus-alertmanager: Add versionCheckHook

---
 pkgs/by-name/pr/prometheus-alertmanager/package.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/by-name/pr/prometheus-alertmanager/package.nix b/pkgs/by-name/pr/prometheus-alertmanager/package.nix
index 651706399c79..297ccdaf93b3 100644
--- a/pkgs/by-name/pr/prometheus-alertmanager/package.nix
+++ b/pkgs/by-name/pr/prometheus-alertmanager/package.nix
@@ -5,6 +5,7 @@
   fetchFromGitHub,
   installShellFiles,
   nixosTests,
+  versionCheckHook,
 }:
 
 buildGoModule (finalAttrs: {
@@ -49,11 +50,17 @@ buildGoModule (finalAttrs: {
 
   passthru.tests = { inherit (nixosTests.prometheus) alertmanager; };
 
+  nativeInstallCheckInputs = [
+    versionCheckHook
+  ];
+  doInstallCheck = true;
+
   meta = with lib; {
     description = "Alert dispatcher for the Prometheus monitoring system";
     homepage = "https://github.com/prometheus/alertmanager";
     changelog = "https://github.com/prometheus/alertmanager/blob/v${finalAttrs.version}/CHANGELOG.md";
     license = licenses.asl20;
+    mainProgram = "alertmanager";
     maintainers = with maintainers; [
       benley
       fpletz